Lecture07-1

# Lecture07-1 - E = 1 4 − 25 × 10 − 9 C 64 × 10 − 9 C...

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Two uniformly charged plastic spherical shells. Find electric field at 3, 7 and 10 cm from the center 3 cm: E= 0 7 cm: E = 1 4 πε 0 Q r 2 ˆ r E = 1 4 πε 0 25 × 10 9 C ( ) 0.07m ( ) 2 ˆ r = 4.6 × 10 4 ˆ r N/C 10 cm: r r Q Q r r Q r r Q E ˆ 4 1 ˆ 4 1 ˆ 4 1 2 2 1 0 2 2 0 2 1 0 + = + = πε
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Unformatted text preview: E = 1 4 − 25 × 10 − 9 C + 64 × 10 − 9 C ( ) 0.1m ( ) 2 ˆ r = 3.5 × 10 4 ˆ r N/C Exercise 2...
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